Wrench.



No. 690,187. Patented Dec. 3|, l90l.

J. L. ROBISON.

WRENCH.

(Application filed Nov. 28, 1900.: (No Model.)

Ya: mum PEYERS co. Puma-Luna WASHNGTON, u. c

iUNTTan STATns PATmiT FFICE.

JESSE L. ROBISON, OF CROSSFORK, PENNSYLVANIA.

WRENCH.

SPECIFICATEON formingpart of Letters Patent No. 690,187, dated December31, 901- Application filed November 28, 1900. Serial No. 38,041. (Nomodel.)

To all whom it may concern:

Be it known that I, JESSE L. ROBISON, acitizen of the United States,residing at Crossfork, in the county of Potter and State ofPennsylvania, have invented new and useful Improvements in renches, ofwhich the following is a specification.

This invention relates to new and useful improvements in wrenches; andits primary object is to provide a device having a sliding jaw which isadapted to be locked at any desired point upon the shank of the fixedjaw.

A further object is to provide means whereby said jaw may be quicklyunlocked from the shank when desired.

With these and other objects in view the invention consists in providinga fixed jaw, upon the shank of which are arranged transversely-extendingteeth orserrations. A jaw is slidably mounted upon this shank, andpivoted therein is a dog having a toothed face adapted to engage theteeth upon the shank. This dog is held normally in engagement with saidteeth by means of a spring seated within the sliding jaw. A yoke ispivoted to the dog and extends around the shank and is adapted whenpressed toward said shank to throw the dog out of engagement with theteeth of the shank, and thereby permit the sliding jaw to be moved.

The invention also consists in certain novel features of constructionand combination of parts, which will he hereinafter fully described andclaimed, and illustrated in the accompanying drawings, showing thepreferred form of my inventiomand in which Figure 1 is a side elevationof the Wrench. Fig. 2 is a longitudinal section. Fig. 3 is a detail viewof the dog and its yoke.

Referring to the figures of the drawings by numerals of reference, 1 isa fixed jaw, from which extends a shank 2, having teeth 3, arranged uponthe inner edge thereof.

A sliding jaw l is mounted upon the shank 2 and is preferably formed oftwo similar castings, each of which is recessed longitudinally for thereception of one-half of the shank and is provided in rear of itsworking face with a recess 5 for the reception of a dog 6. When twocastings are brought together, the reeesses 5 form a chamberhavinginclined walls 5 and 5" sufliciently separated to permit therequired movement of the 'dog 6. This dog is preferably of the formshown in Fig. 2 and is provided at its upper end with trunnions '7,which are pivot-ed in the two sections of the casting. The lower face ofthe dog is beveled, so as to lie normally parallel with the toothed faceof the shank, and this face of the dog is provided withtransversely-extending teeth 8, which are held normally in engagementwith the teeth of the shank by means of a bow-spring 9, which bears at0pposite ends upon the walls of the recess 5 and the rear face of thedog 6. In lieu of the trunnions '7 a rivet or bolt may be insertedthrough the sections of the sliding jaw and through an aperture (notshown) formed within the end of the dog.

A yoke 10 incloses the shank 2, and the ends thereof are turned inwardand pivoted within the dog 6 at a point adjacent to the toothed facethereof. The two sections of the jaw are secured together in anysuitable manner, as by means of rivets or bolts.

When it is desired to adjust the sliding jaw toward the fixed jaw, it ismerely necessary to move the same along the shank. The teeth upon saidshank will force the dog upward out of engagement therewith, and thesame will be free to slip thereover. When, however, backward pressure isexerted upon the sliding jaw, the dog therein will engage the teeth uponthe shank and prevent backward movement.

When it is desired to slide the jaw 4: from the fixed jaw, the yoke 10is pressed toward the shank. This will cause the dog to swing upwardupon its pivot, and the sliding jaw can then be readily removed.

It will be seen that the pivot of the dog is located at a point aboveand in front of the point of contact between the dog and shank, andtherefore any backward pressure upon the sliding jaw will tend to throwthe dog more firmly into engagement with the shank.

I11 the foregoing description I have embodied the preferred form of myinvention; but I do not wish to be understood as limiting myselfthereto, as I am aware that modifications may be made therein withoutdeparting from the principle or sacrificing any of the advantages ofthis invention, and I therefore reserve to myself the right to make suchchanges as fairly fall Within the scope thereof Having thus describedthe invention, what is claimed, and desired to be secured by LettersPatent, is-

A wrench comprising a toothed shank, a fixed jaw on said shank, asliding jaw consisting of two sections recessed on their inner sides andadapted when brought together to form a chamber having inclined Wallsand also formed with registering bearings, a dog provided at one endwith trunnions fitting in said bearings, the opposite end being beveledpermitting it to lie normally parallel with the toothed face of theshank, and being toothed to engage the teeth upon the shank, a bow-JESSE L. ROBISON.

WVitnesses:

E. PELTZ, S. G. MEARs.

